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<h1>今天要做周作业，好开心！</h1>
<h2>今天要做周作业，好开心！</h2>
<h3>今天要做周作业，好开心！</h3>
<h4>今天要做周作业，好开心！</h4>
<h5>今天要做周作业，好开心！</h5>
<h6>今天要做周作业，好开心！</h6>
<div>今天不做周作业，做梦！</div>
<div>今天不做周作业，做梦！</div>
<div>今天不做周作业，做梦！</div>
<div>今天不做周作业，做梦！</div>
<div>今天不做周作业，做梦！</div>
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